Wall tie replacement across Gwynedd
We cover 4 towns in Gwynedd: Bangor, Caernarfon, Holyhead and Porthmadog.
Exposure matters for every cavity wall. Parts of Gwynedd face some of the heaviest wind-driven rain in the UK, especially exposed coastal and upland sites. Here the survey is stricter: some walls suit only certain certified systems, and some should not be filled at all.
If your Gwynedd installation has a guarantee, we check it first; the guarantee route may cover the work. We never cold-call in Gwynedd or anywhere else, and we do not work with doorstep claims companies.
Building Regulations in Wales
In Wales, filling an existing cavity is also notifiable building work under the Building Regulations as they apply in Wales. A registered installer normally self-certifies it through a competent person scheme; otherwise a building notice goes to your council's building control before work starts. Welsh rules can differ from England's, so the notification route is confirmed in writing on your quote.
Sources: Welsh Government: building work competent person schemes; CIGA: CWISC competent person scheme; Welsh Government: issues arising from cavity wall insulation installations.
Ties and cavity insulation
Ties should be checked before a cavity is filled. Fitting remedial ties does not normally stop a cavity being insulated later, and we can do both in one visit. Where cracking suggests movement, we recommend a structural engineer's view first.
What is included
- Tie inspection with metal detector and borescope
- Remedial stainless ties to a set pattern
- Isolation or removal of old ties where needed
- Making good
Wall tie replacement prices in Gwynedd
| Wall tie replacement guide prices | Guide price |
|---|---|
| Remedial wall ties, detached house | £1,995–£3,495 |
| Remedial wall ties, semi-detached house | £1,495–£2,495 |
| Remedial wall ties, terraced house | £995–£1,795 |
This work is not insulation, so it is normally standard-rated for VAT. Guide prices include VAT where it applies. Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
From enquiry to finish in Gwynedd:
Tell us what is happening
Postcode, property type and what you have noticed.
Price agreed first
We confirm the price before anyone visits.
Visit and checks
Photos and readings at the areas that matter.
Findings in writing
What we found and the options, each priced separately.